Car-brake.



M. A. PAHLER.

GAR BRAKE.

APPLICATION FILED JAN. 27, 1910.

976,595. Patented N0v.22, 1910.

ZSHBETS-SHEETI- j 33 04- I a M. A. PAHLER.

GAR BRAKE.

APPLICATION FILED JAN. 27, 1910.'

976,595. Patented Nov. 22, 1910.

2 SHEETS--SHEET 2.

3 3 woaw MARTIN A. PAHLER, OF HARTFORD, CONNECTICUT.

CAR-BRAKE.

Specification of Letters Patent.

Patented Nov. 22, 1910.

Application filed January 27, 1910. Serial No. 540,340.

T 0 all whom it may concern:

Be it known that I, MARTIN A. PAHLER, a citizen of the United States,residing at New Britain, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements in Car-Brakes, of which the following is a specification.

My invention relates to improvements in car brakes and the objects of myimprovements are simplicity and economy in construction and convenienceand efficiency in use. a

In the accompanying drawings :-Figure 1 is a side elevation of a cartruck and my improved brake. Fig. 2 is a perspective view on an enlargedscale of a part of the same. Fig. 3 is a similar view of another part.Fig. 4 is a side elevation of my brake and truck wheels, the truck beingomitted. Fig. 5 is a perspective view on an enlarged scale of my lowerbracket.

A is the body of a car truck which through springs 10 is supported onjournals 11 mounted on the axles 12 which in turn are supported by thewheels 13 in the usual manner, the said body comprising on each side aside frame 14, generally horizontal, outside of the wheels 13 and abovethe axles 12, and provided with means for supporting elliptical springs15 through which the car body is supported. The said side frames arecross connected by transoms 16 extending across the top adjacent thecentral line. Mounted on the rear transom in a rigid manner is a pair oftop brackets 17, essentially in line with the wheels 13, extendingupwardly and rearwardly and provided with a pivotal bearing for a pin 18which supports by its upper end and in a pendent position a dead leverB. To the inner face of each of the side frames 14 are attached a set offour lower brackets J, the said brackets being provided on the sideadjacent the said side frames with a series of elongated holes or slots19 adapted to receive clamping bolts 20. Shoe supports 39 are rigidlyclamped to an inwardly projecting and overhanging arm on the said lowerbrackets J, and inclined downwardly from the said arm.

The bracket shoes C are hung from the lower ends of said shoe supports39 by means of links D which are pivotally connected by their upper endsby means of ins 21 to said lower ends and are pivotally connected attheir lower ends by pins 22 tothe said shoes G, the said pins being heldin place laterally by cotter pins 23. The said shoes C have the usualare shaped friction surface 24 adapted to engage with the wheel surface,which as shown is adapted to engage with the lower wheel surface on theinner side of the wheel or the side toward the middle of the truck. Onthe side of the said pivotal support 22 remote from the said frictionsurface 24 the said shoe is provided with an inwardly directed arm 25having at the inner end a pivot hole adapted to receive a pivotal pin26. The rear shoes C are pivotally attached by the said pins 26 to thesaid dead lever B ad jacent the lower ends 27. The pivotal pin 26 in thefront shoes C serves as a pivotal support for a live lever H adjacentthe lower end 28, the said lever generally extending upwardly above thesaid side frames 14.

On each side the lower end 27 of the dead lever B and the lower end 28of the live lever H are adjustably cross connected by a tie rod E,theends of which are pivotally mounted on pins 29 provided in said lowerends, the said rod being provided with means of adjustment of the lengthcomprising a turn buckle 30. The upper ends 31 of said live levers H arecross connected by a hori-- zontal lever F. The said horizontal levercomprises a flat bar I having at the center a hole 32 adapted forpivotal connection for a brake rod G and having the ends 33 drawn downto a circular form adapted to be received in bearing holes 34 in saidlive levers and retained laterally in position by shoulders 35 at thejunction of the said circular bearing and the rectangular body portion36. Cotter pins 37 may be provided in the extreme ends outside of thesaid live levers H.

Normally when in disengaged position the brake shoes C hang in pendentposition by means of the links D, the line of support being such thatthe said shoes fall or swing away from the wheels 13 and toward oneanother, the tie rod E in combination with the pivotal connections ofthe dead lever B and the live lever H insuring the concentricity of thesaid friction surface 24. At the same time the said upper ends 31 of thelive levers H, the flat bar I attached thereto and the brake rod Gattached to the said fiat bar I are located in their extreme backwardpositions. By means of the said turn buckle 30 the position of the shoesO in such normal positions may be so adjusted asto;

rod G will serve to bring the said friction surface 24 in brakingengagement with the said Wheels 13, and a braking direct to the wheels.Upon relaxing the pull on rod G the release is essentially instantaneous and automatic, 'the bra-ke shoes. C falling away to thenormal disengaged position described on account of the weights of theinterconnected parts. Y i, f

K --is a safety hook under the ends of the tie rod E, adapted to supportthe same in case of intentional or accidental disengagement ofsupporting members. g

It is apparent that some changes from the specific construction hereindisclosed may be made and therefore I do not wish to be understood aslimiting myself to'the precise form of construction shownfand described,but desire the liberty to make such changes, in Working my invention, asmay fairly come within the splrit and scope of the same.

I claim as my invention a f 1. A car brake in combination with a cartruck comprising on each side' a set of brake shoes inwardly hung, thesaid shoes pivotally supported in a pendent position, a dead leverpivotally supported by its upper'end and attached near its lower end toone shoe, a live lever attached said shoes free from other connections,the said levers interconnected at the lower ends 7 adjacent the centralline pull applied the said live levers cross to the said rod G istransmitted essentially 'tion of the said levers and arockingconnection,

with shoulders limiting the separation of the c of support for linkspivotally to the othershoe, the a by tie rod, the said live leversarranged so as, to be each inwardly receding from its lower such lengthas to overhang the truck body of the truck, and connected at their upperends by an operating bar, the connecbar comprising the said bar providedsaidlevers, and the said bar straight and located adjacent the centralline of the truck, and a brake rod connected by an essentially fix'edpivotal connection to the center of the said bar.

2. In a car brake in combination with a car truck comprising sideframes, the said car brake comprising front and rear brake shoes, deadlevers connected to the rear shoes, live levers connected to the frontshoes, the live lever and dead lever on each side connected by a tierod, the said brake shoes'supported in a pendent position andinterconnected with said levers, the means said brake shoes comprisingsupported by their upper ends from brackets, the said brackets securedto said side frames by clamping bolts, and provided with elongatedreceiving holes for said clamping bolts.

MARTIN A. PAHLER.

end toward its upper end and of

